How to Apply Background Styles in PowerPoint 2007
When you apply a color theme to your PowerPoint presentation, PowerPoint offers background styles consisting of four colors and three fills, and three fill effects. These three fills are Subtle, Moderate, and Intense. For example, the Subtle fill might be a solid color, the Moderate fill might be a gentle pattern applied to the color, and the Intense fill might be a bold gradient fill.
To apply one of the theme’s background styles to your presentation, follow these steps.
Click the Background Styles control.
This control reveals the Background Styles gallery.
Choose a style from the gallery.
And just like that, you’ve got style!